#635CBB
Closest named color: Iris (#6258C4). oklch(52.9% 0.145 283.6), rgb(99, 92, 187).
Aa
White text reads best on this color (5.55:1).
About this color
#635CBB is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.145 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.018 away. White text reads best on it, at 5.55:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.77:1 |
| White text | 5.55:1 |
Values
| HEX | #635CBB |
| RGB | rgb(99, 92, 187) |
| HSL | hsl(244, 41%, 55%) |
| OKLCH | oklch(52.9% 0.145 283.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #635CBB | 5.55:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #635CBB | 3.77:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #635CBB text on white | 5.55:1 | AA | Lc 77.6 | Fine for body text |
| #635CBB text on black | 3.77:1 | AA large text | Lc -24.2 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E8F6
oklch(93.5% 0.019 286)
-
Step 200
200
#D5D7F1
oklch(88.6% 0.036 282.1)
-
Step 300
300
#BABCEA
oklch(80.9% 0.065 282.9)
-
Step 400
400
#9898E0
oklch(70.8% 0.104 283.4)
-
Step 500
500
#807DD7
oklch(63.2% 0.133 283.4)
-
Step 600
600 (this color)
#635CBB
oklch(52.9% 0.145 283.6)
-
Step 700
700
#5953A9
oklch(49.2% 0.133 283.5)
-
Step 800
800
#494489
oklch(42.7% 0.111 283.9)
-
Step 900
900
#3C3A6E
oklch(37.7% 0.087 283.1)
-
Step 950
950
#232240
oklch(26.9% 0.055 283.6)
#635CBB with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #306BBE | 0.065 |
| Deuteranopia (no green cones) | #2B65B9 | 0.066 |
| Tritanopia (no blue cones) | #457083 | 0.122 |
| Achromatopsia (no color) | #686868 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #635CBB
#635CBB
oklch(52.9% 0.145 283.6)
- #776E00
#776E00
oklch(53% 0.112 103.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #635CBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.018
- Slate Blue #6A5ACD ΔE 0.031
- Dark Periwinkle #665FD1 ΔE 0.035
- Light Indigo #6D5ACF ΔE 0.035
- French Blue #436BAD ΔE 0.061
- Warm Blue #4B57DB ΔE 0.063
- Bluey Purple #6241C7 ΔE 0.065
- Deep Lavender #8D5EB7 ΔE 0.071
Use #635CBB in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.